docs: def as_protein(structure, filter_residues=True):
      """ Exposes methods in the Bio.Struct.Protein module.
          Parameters:
              - filter_residues boolean; removes non-aa residues through Bio.PDB.Polypeptide is_aa function
                [Default: True]
          Returns a new structure object.
      """
  
      from ssbio.biopython.Bio.Struct.Protein import Protein
      return Protein.from_structure(structure, filter_residues)